Trolley.



PATENTED MAY 23', 1905. y J HUMPHRBY.

l LLEY.

FILED SEPT. 21, 1904.

UNITED STATES Patented May 23, 1905.

PATENT OEEIcE.

JOHN B. HUMPHREY, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE- HALF TO SAM B. OROWDER, OF LOUISVILLE, KENTUCKY.

TROLLEY SPECIFICATION forming part of Letters Patent No. 790,434, dated May 23, 1905.

Application filed September 21, 1904. Serial No. 225,364.

T0 all whom t may concern/ Be it known that I, JOHN B. HUMPHEEY, a citizen of the UnitedStates, residing at Louisville, county of Jefferson, State of Kentucky, have invented certain new and useful Improvements in Trolleys, of which the following is a specification.

The object of my invention is to produce an improved trolley-pole wherein the trolleywheel is mounted upon the pole in such manner that it is free to follow the curves or other irregularities in the conductor-wire of an electric railroad, thereby obviating the displacement of the wheel from the wire when the car is rounding a curve; and with this and minor objects my invention consists in the parts and combination of parts, as will b'enhereinafter more fully set out. p

In the drawings, Figure 1 is a side elevation of a trolley-pole broken away embodying my invention. Figs. 2 and 3 are detail sectional views of the joint.

l represents a hollow trolley-pole of lany approved construction.

2 is the lower member of my improved joint, consisting of the casting having a tangent lug 3, provided with reduced portion 3, which fits in the upper'end of the pole 1 and is rigidly sec'ured in this position by means of the rivet 3b. The member 2 is provided with a central vertical bore 4, surrounding the top ofv which is an enlarged recess 5 below the top line of said member 2.

5b is a ball-raceway in which balls 5 are placed.

The upper member 5YL of my improved joint l is provided with a depending flange 6, forming a cavity or a recess Z in the bottom thereof in which is formed a raceway 7.

8 is a central vertical bore exten ding through' the member 5, and 9 is a depending annular lug surrounding said vertical bore 8 within the recess 7, said annular lug extending below the annular iiange 6 and adapted to seat in the enlarged recess 5 of the member 2, and when so seatedy the annular flange 6 laps and surrounds the member 2, whereby water, &c.

is shed, and thus prevented from entering the joint between the two members when they are secured together.

l() is a bolt of suitable construction which passes through the bores of the two members, thereby holding them together when the nut 11 is screwed upon said bolt, as shown in Fig. 1.

The harp l2 of the trolley-pole is vformed integral with the upper member 5, as clearly shown in Figs. 1 and 2.

13 is the usual trolley-wheel, secured in any suitable manner in said harp.

It will thus be seen that I have by my invention provided a very simple, cheap, but effective construction of joint in a trolleypole whereby the trolley-wheel is free toadjust itself on the conductor-wire Whenever it meets an irregularity or a cur-ve in said wire, thus insuring the contact of the trolley-wheel with the conductor under all conditions that may be met in the construction of the road.

What I claim, and desire to secure by Letters Patent, is-

The combination with a trolley-pole of a casting secured to the top thereof and provided with a recess in its upper face and a vertical central bore, of a trolley-harp having a vertical central bore, a peripheral depending annular flange integral with said trolley-harp, and a dependingannular lug surrounding the vertical bore in said harp and extending below the depending annular flange, said annular lug adapted to enter and be seated in the recess in the top of the casting, said depending annular flange constructed to surround the casting and cover the joint between the casting and trolley-harp, Aand a A bolt extending through the vertical bores of the casting and the harp, whereby the parts are journaled together.

The foregoing specification signed this 29th day of August, 1904.

JOHN B. HUMPHREY.

In presence of- E. K. PENNEBAKER,

S. O. ELLIOTT. 

